I think I figured it out. I wasn't logged in (my account is listed in US), but I was viewing the page from Canada, so it must have put me in the Canadian Kindle store. When I logged in, it listed the price as $1.99.
I read an excerpt of it in Lightspeed Magazine and found it good without having read the prior novels, that said I have seen the movie that is based on the novels.
http://www.amazon.com/Impulse-ebook/d...